Monas (O. F. Muller) Stein, 1878 (ref. ID; 4656), (O. F. Muller) Stein, 1893 (ref. ID; 1618) or (Ehrenberg) Stein (ref. ID; 3517)
Synonym; Physomonas Kent (ref. ID; 1618)

[ref. ID; 1618]
Similar to Ochromonas, but without chromatophores; active and plastic; often attached to foreign objects; body small, up to 20 um long; fresh and salt water. (ref. ID; 1618)

Monas amoebina Meyer
See; Monas guttula (ref. ID; 4656)
Monas arhabdomonas (Fisch.) H. Meyer (ref. ID; 3342, 3517) reported author and year? (ref. ID; 2658)
Monas cylindrica Skuja (ref. ID; 3517)
Monas dinobryonis Skuja (ref. ID; 3342)
Monas elongata Stokes (ref. ID; 1618) or (Stokes) Lemmermann (ref. ID; 3517)
Monas guttula Ehrenberg, 1830 (ref. ID; 4656) reported year? (ref. ID; 1618, 1796)
Syn; Monas amoebina Meyer (ref. ID; 4656); ?Monas arhabdomonas Meyer (ref. ID; 4656); ?Monas dangeardi Lemm. (ref. ID; 4656); Monas mediovacuolata var. facilis Skuja (ref. ID; 4656); Monas vulgaris (Cienk.) Senn (ref. ID; 4656); Sterromonas formicina Kent (ref. ID; 4656)
Monas mediovacuolata Skuja (ref. ID; 3342) reported author and year? (ref. ID; 2659)
Monas mediovacuolata var. facilis Skuja
See; Monas guttula (ref. ID; 4656)
Monas minima H. Meyer (ref. ID; 3342, 3497, 3517) reported author and year? (ref. ID; 2659)
See; Monas termo (Muller) (ref. ID; 4656)
Monas obliqua Schewiakoff (ref. ID; 3517)
Monas ocellata (Scherffel) Pringsheim, 1963 (ref. ID; 4656)
Syn; Heterochromonas vivipara f. minor Bourrelly (ref. ID; 4656)
Monas sociabilis Meyer (ref. ID; 1618, 3517)
Monas socialis Kent (ref. ID; 1618)
Monas termo Ehrenberg (ref. ID; 1796)
Monas termo (Muller) nov. comb (ref. ID; 4656 redescribed paper)
Syn; Cercomonas termo Stein (ref. ID; 4656); Monas minima Meyer (ref. ID; 4656); Oicomonas termo (Ehrenberg) Kent (ref. ID; 4656)
Monas uniguttata Skuja (ref. ID; 3342) reported author and year? (ref. ID; 2659)
Monas vestita (Stokes) (ref. ID; 1618) or (Stokes) Reynolds (ref. ID; 4656)
See; Paraphysomonas vestita (ref. ID; 4656)
Monas vivipara Ehrenberg (ref. ID; 3517)
Monas vulgaris (Cienk.) Senn (ref. ID; 3517) reported author and year? (ref. ID; 2658)

Monas arhabdomonas (Fisch.) H. Meyer (ref. ID; 3342, 3517) reported author and year? (ref. ID; 2658)
Measurements; 9-13 um. (ref. ID; 3342)

Monas dinobryonis Skuja (ref. ID; 3342)
Measurements; 6.5-9 x 5 um. (ref. ID; 3342)

Monas elongata Stokes (ref. ID; 1618) or (Stokes) Lemmermann (ref. ID; 3517)
Description; Elongate; free-swimming or attached; anterior end obliquely truncate; fresh water. (ref. ID; 1618)
Measurements; About 11 um long. (ref. ID; 1618)

Monas guttula Ehrenberg, 1830 (ref. ID; 4656) reported year? (ref. ID; 1618, 1796)
Syn; Monas amoebina Meyer (ref. ID; 4656); ? Monas arhabdomonas Meyer (ref. ID; 4656); ? Monas dangeardi Lemm. (ref. ID; 4656); Monas mediovacuolata var. facilis Skuja (ref. ID; 4656); Monas vulgaris (Cienk.) Senn (ref. ID; 4656); Sterromonas formicina Kent (ref. ID; 4656)
Description; Spherical to ovoid; free-swimming or attached; longer flagellum about one to two times body length; stagnant water. (ref. ID; 1618)
Measurements; 14-16 um long; cysts 12 um in diameter. (ref. ID; 1618)

Monas mediovacuolata Skuja (ref. ID; 3342) reported author and year? (ref. ID; 2659)
Measurements; 13-20 x 8.7 um. (ref. ID; 3342)

Monas minima H. Meyer (ref. ID; 3342, 3497, 3517) reported author and year? (ref. ID; 2659)
See; Monas termo (Muller) (ref. ID; 4656)
Description; The minute form of the Genus Monas carrying two unequal flagella and no chromatophore. The cell of the small colourless flagellate is variable from globular to oblong forms, and is provided with minute grains on the surface of the anterior half. The longer flagellum is typically straight and thick, and is 3-4 times as long as the cell, while the shorter usually spirals and in nearly equal to it. The nucleus is located in the anterior region and the contractile vacuoles and leucosin granules rarely appear. (ref. ID; 3497)
Measurements; 3.5-5.4 x 2-3.5 um. (ref. ID; 3342)
Length 5-7 um. (ref. ID; 3497)

Monas sociabilis Meyer (ref. ID; 1618, 3517)
Description; 2 unequal flagella; the longer one is as long as body and the shorter one about one-fourth; 20-50 individuals form a spheroid colony, resembling a detached colony of Anthophysis; polysaprobic. (ref. ID; 1618)
Measurements; Body 8-10 by 5 um. (ref. ID; 1618)

Monas socialis Kent (ref. ID; 1618)
Description; Spherical; among decaying vegetation in fresh water. (ref. ID; 1618)
Measurements; 5-10 um long. (ref. ID; 1618)

Monas uniguttata Skuja (ref. ID; 3342) reported author and year? (ref. ID; 2659)
Measurements; 4-6.5 um. (ref. ID; 3342)

Monas vestita (Stokes) (ref. ID; 1618) or (Stokes) Reynolds (ref. ID; 4656)
See; Paraphysomonas vestita (ref. ID; 4656)
Description; Spherical; pond waters. (ref. ID; 1618)
Measurements; About 13.5 um in diameter; stalk about 40 um long. (ref. ID; 1618)